Regular political commentators, E.J. Dionne of The Washington Post and David Brooks of The New York Times, discuss Veterans Affairs Secretary Eric Shinseki's resignation and President Obama's foreign policy speech at West Point.

This year marks the 25th anniversary of the Tiananmen Square massacre, and human rights observers say that Chinese authorities are cracking down more than ever on activists and intellectuals. Maya Wang, a researcher with Human Rights Watch, discusses the dubious anniversary and the harsh response that has followed.

Veterans Affairs Secretary Eric Shinseki apologized for lengthy waits at VA facilities, saying he's ousting the leaders of a VA hospital in Phoenix, Ariz., after stories about delays in care there. Shinseki's decision to resign marks a muddy end to an illustrious career, which began when he joined the Army nearly five decades ago.

Somaly Mam gained an international following in her crusade against sex trafficking, partly because of her own story of childhood sex slavery. Now, though, that story is under scrutiny, and Mam has resigned from the organization she leads. Melissa Block speaks with Simon Marks, former executive editor of The Cambodia Daily, whose recent Newsweek cover piece is credited with raising sharp questions about Mam's history.